jack-knife
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vi. 中间呈V形弯
vi.
中间呈V形弯；
变形
过去式：jack-knifed现在分词：jack-knifing第三人称单数：jack-knifes
英英释义
jack-knife
n.
a large knife with one or more folding blades
同义词：clasp knifejackknife
a dive in which the diver bends to touch the ankles before straightening out
同义词：jackknife
v.dive into the water bending the body at the waist at a right angle, like a jackknife
同义词：jackknife
双语例句
A heavy lorry has jack-knifed on the motorway, causing long delays.
一辆重型铰接货车在高速公路上撞成V字形，耽搁了很长时间。
权威例句
Jack-knifeJACK-KNIFE
Jack-knife
Bootstrap Methods: Another Look at the Jackknife
Bootstrap Methods: Another Look at the Jackknife
Bootstrap Method: Another Look at the Jackknife
1977 Rietz Lecture—Bootstrap Methods—Another Look at the Jackknife
Bootstrap methods: Another look at jackknife
The Jackknife, the Bootstrap and Other Resampling Plans
The Jackknife, the Bootstrap and other resampling plans
The Jackknife, the Bootstrap and other resampling plans
A Leisurely Look at the Bootstrap, the Jackknife, and Cross-Validation
The jackknife, the bootstrap and other resampling plans. Society for Industrial and Applied Mathematics
jack-knife (n.)
also jackknife, large pocket knife, 1711, probably American English, "perh[aps] associated with some sense of JACK sb.1, but compare jackleg knife" [OED]; see jack + knife (n.). Jackleg was a U.S. colloquial term of contempt from c. 1850. On another theory, so called because it originally was associated with sailors. As a kind of swimming dive, from 1922. As a type of tractor-trailer accident, 1966. Both from the notion of folding, as the knife does.
jack-knife (v.)
1776, "to stab," from jack-knife (n.). Intransitive meaning "to fold or bend" the body is said to date from the time of the American Civil War. The truck accident verbal sense is from 1949. Related: Jackknifed; jackknifing.
1. A new jack-knife or a box of candy pleased the older ones as much as the little fellow.
一种新的自升式刀或糖果盒高兴的是年纪较大的多为小家伙。
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2. When making Jack-o-lanterns, be careful with the knife and try not to cut your fingers off!
做“杰克灯”的时候用小刀要小心，不你的手指割掉！
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3. When making Jack - o - lanterns, be careful with the knife and try not to cut your fingers off!
做“杰克灯”的时候用小刀要小心，不要把你的手指割掉！
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4. When making Jack - o - lanterns, be careful with the knife and try not to cut your fingers off!
做“杰克灯”的时候用小刀要小心，不要把你的手指割掉！
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5. He is standing on the front lawn, idly tossing a jack-knife into the air and trying to make it stick in the, ground.
他正站在前院的草地上，悠闲地向空中甩着一把折刀，想要把它插在地上。
-- 来源 -- 英汉 - 翻译样例
6. His stump of a tail shut down as close as his owner ever shut the short, stubbed blade of his jack-knife.
它那半截尾巴紧贴在身后，紧得象它的主人把大摺刀短粗的刀刃的摺叠起来那样。
-- 来源 -- 英汉 - 辞典例句
jack-knife
